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OpenAI: GPT-5.3-Codex vs OpenAI: GPT-5.4

Last updated at: 2026-03-12

Metric GPT-5.3-Codex GPT-5.3-Codex medium Release: 2026-02-05 GPT-5.4 GPT-5.4 medium Release: 2026-03-05
Rank #4 #10
Avg Score 8.4 8.0
Consistency 9.1 8.5
Cost per result 4.485 6.601
Total Cost $0.539 $0.793
Tests Correct
Attempt pass rate 83.3% 83.3%
Flaky tests 2 3
Total Runs 48 48
Output Tokens 1,764 1,756
Reasoning Tokens 33,348 46,642
Response Time (avg) 16.59s 20.05s
Response Time (max) 100.93s 100.41s
Response Time (total) 265.39s 320.87s

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Avg Score vs Total Output Tokens

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 10.0 10.0 100.0% 0 4.69s 216 1,421
GPT-5.4 10.0 10.0 100.0% 0 5.02s 216 1,466
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 10.0 10.0 100.0% 0 19.56s 364 2,731
GPT-5.4 10.0 10.0 100.0% 0 20.57s 301 3,543
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 9.9 10.0 100.0% 0 3.07s 234 728
GPT-5.4 9.9 10.0 100.0% 0 5.32s 234 804
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 4.0 7.2 55.6% 1 64.31s 64 25,308
GPT-5.4 4.0 7.2 44.4% 1 74.27s 61 34,748
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 4.0 10.0 0.0% 0 4.87s 187 331
GPT-5.4 5.0 3.1 33.3% 1 4.92s 145 321
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 10.0 10.0 100.0% 0 3.04s 93 693
GPT-5.4 10.0 10.0 100.0% 0 3.11s 93 897
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 9.3 7.9 88.9% 1 5.12s 352 1,644
GPT-5.4 7.0 7.2 88.9% 1 9.13s 442 3,832
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 10.0 10.0 100.0% 0 6.37s 254 492
GPT-5.4 10.0 10.0 100.0% 0 13.28s 264 1,031

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